Zhengzhou Zhengyang Machinery Equipment Co., Ltd

What is the principle of blister copper refining?

2021-06-16

Through the electrolysis of the electrolyte solution, blister copper is used as the anode, pure copper is used as the cathode, and the solution containing copper ions is used as the electrolyte. The copper is dissolved from the anode and precipitated at the cathode. The impurities in the blister copper, the inactive impurities do not dissolve, and become anode mud and settle at the bottom of the electrolytic cell. Although the active impurities are dissolved in the anode, they cannot be precipitated in the cathode. Therefore, high purity copper can be obtained through electrolysis of the cathode.

The copper electrolytic refining process has been applied in industry for the first time since 1896, and has a history of 140 years. During this period, although the basic principle has not changed, it has advantages in terms of technical equipment level, production scale, electric copper quality, and reduction of energy consumption. Great progress.

Copper Electrolysis Machine

Copper Electrolysis Machine

The main equipment of copper electrolytic refining:

(1) Electrolyzer

The electrolytic cell is the main equipment of the copper electrolysis workshop. It is a rectangular cell with an anode plate and a cathode, and the cathode and anode are hung alternately. There are liquid discharge outlets and mud discharge outlets in the tank.

The electrolytic cell is generally constructed of reinforced concrete and lined with anti-corrosion resin, so that the cell body can play the role of supporting the anode and the anode, and also play the role of acid prevention. The electrolytic cells are sequentially arranged on the supporting beams, and the beams are covered with insulating materials to prevent the cell body from conducting electricity with the ground.

(2) Cathode manufacturing unit

The function of this unit is to make the cathodes after embossing, rivet ears (piercing rods) and flattening the copper skin stripped from the titanium mother board, and then arrange the cathodes to be lifted away by crane.

The cathode manufacturing unit needs to be manufactured by a professional manufacturer due to its unique function. In the design and manufacture of this unit, the thickness of the copper skin and the processing capacity of the rivet ears should be considered.

(3) Anode processing unit

The function of the unit is to process the anode plate refined from the fire method to meet the standards required by the electrolysis process. The various processes of the unit are: flattening the anode plate surface, closing ears, pressing ears, anode plate row spacing, etc.

In the design and manufacture of the anode processing unit, the quality of the oil pressure seals and the processing capacity of the anode plate should be fully considered.

(4) Electric copper washing unit

The function of this unit is to wash, dry, draw out the conductive rods, stack, pack, and weigh the electric copper after being discharged from the tank. Many domestic copper electrolysis manufacturers have not adopted this unit, but rely on manual labor to complete the various functions of the unit.

(5) Residual pole unit

The function of this unit is to wash, stack, pack, weigh, etc. the residual poles after being discharged from the tank, and then send the packaged residual poles to the fire method for refining and remelting. Due to the simple function of this unit, many domestic copper electrolysis manufacturers have not adopted this unit, and rely on manual work to complete the treatment of residual poles.

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